Transition densities in Si30 studied by electron scattering and coupled-channel calculations of 650 MeV proton scattering

R. A. Miskimen, A. M. Bernstein, G. Bernhardt, C. F. Williamson, B. A. Brown, Ricardo Alarcon

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Proton and neutron transition densities in Si30 are examined by a combination of intermediate energy (e,e) and (p,p) reactions and mirror electromagnetic transition rates. This analysis is performed for the 21+ and 22+ states at 2.234 and 3.499 MeV in Si30. Electron scattering data are presented for these states. Shell-model calculations for the proton and neutron transition matrix elements and proton transition densities are compared with the electromagnetic results. The proton transition densities are reasonably predicted for the 21+ state but are not adequately predicted for the 22+ state. A microscopic coupled-channel calculation of 650 MeV (p,p) is used to test the shell-model isoscalar transition densities. Given the uncertainties present in the reaction calculation and interaction, the isoscalar density for the 21+ state is found to be adequate, but the density for the 22+ state is less accurate. The coupled-channel effect is shown to be important for the 22+ state. This dependence increases with energy but should be taken into account for an accurate description of (p,p) reactions at all energies.

Original languageEnglish (US)
Pages (from-to)1600-1608
Number of pages9
JournalPhysical Review C
Volume37
Issue number4
DOIs
StatePublished - 1988
Externally publishedYes

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proton scattering
electron scattering
protons
electromagnetism
neutrons
energy
mirrors
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Transition densities in Si30 studied by electron scattering and coupled-channel calculations of 650 MeV proton scattering. / Miskimen, R. A.; Bernstein, A. M.; Bernhardt, G.; Williamson, C. F.; Brown, B. A.; Alarcon, Ricardo.

In: Physical Review C, Vol. 37, No. 4, 1988, p. 1600-1608.

Research output: Contribution to journalArticle

Miskimen, R. A. ; Bernstein, A. M. ; Bernhardt, G. ; Williamson, C. F. ; Brown, B. A. ; Alarcon, Ricardo. / Transition densities in Si30 studied by electron scattering and coupled-channel calculations of 650 MeV proton scattering. In: Physical Review C. 1988 ; Vol. 37, No. 4. pp. 1600-1608.
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AU - Miskimen, R. A.

AU - Bernstein, A. M.

AU - Bernhardt, G.

AU - Williamson, C. F.

AU - Brown, B. A.

AU - Alarcon, Ricardo

PY - 1988

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N2 - Proton and neutron transition densities in Si30 are examined by a combination of intermediate energy (e,e) and (p,p) reactions and mirror electromagnetic transition rates. This analysis is performed for the 21+ and 22+ states at 2.234 and 3.499 MeV in Si30. Electron scattering data are presented for these states. Shell-model calculations for the proton and neutron transition matrix elements and proton transition densities are compared with the electromagnetic results. The proton transition densities are reasonably predicted for the 21+ state but are not adequately predicted for the 22+ state. A microscopic coupled-channel calculation of 650 MeV (p,p) is used to test the shell-model isoscalar transition densities. Given the uncertainties present in the reaction calculation and interaction, the isoscalar density for the 21+ state is found to be adequate, but the density for the 22+ state is less accurate. The coupled-channel effect is shown to be important for the 22+ state. This dependence increases with energy but should be taken into account for an accurate description of (p,p) reactions at all energies.

AB - Proton and neutron transition densities in Si30 are examined by a combination of intermediate energy (e,e) and (p,p) reactions and mirror electromagnetic transition rates. This analysis is performed for the 21+ and 22+ states at 2.234 and 3.499 MeV in Si30. Electron scattering data are presented for these states. Shell-model calculations for the proton and neutron transition matrix elements and proton transition densities are compared with the electromagnetic results. The proton transition densities are reasonably predicted for the 21+ state but are not adequately predicted for the 22+ state. A microscopic coupled-channel calculation of 650 MeV (p,p) is used to test the shell-model isoscalar transition densities. Given the uncertainties present in the reaction calculation and interaction, the isoscalar density for the 21+ state is found to be adequate, but the density for the 22+ state is less accurate. The coupled-channel effect is shown to be important for the 22+ state. This dependence increases with energy but should be taken into account for an accurate description of (p,p) reactions at all energies.

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